PART 2. Noise exposure problems (20 points)For each of these examples, calculate the total dose of noise exposure and make a specific recommendation (if needed) to reduce the dose. Be sure to consider the field attenuation factor for any PPE you might recommend. Available PPE includes foam ear plugs with NRR=27 or ear muffs with NRR=33. Use field attenuation equation (NRR-7)/2A metal fabrication worker’s typical day: Allowable Dose8:00-9:45 95 dB9:45-10:00 80 dB10:00-11:30 90 dB11:30-12:00 75 dB12:00-2:00 95 dB2:00-2:15 80 dB2:15-4:30 90 dBTOTAL DOSE Recommendation Effective dose with implementationNight Shift factory maintenance worker Allowable Dose
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